A total of 1,000 US male veterans with early stage prostate cancer will be recruited to participate in the study. In order to maximize African-American participation, VA medical centers that serve large minority populations will be utilized for recruitment. Eligible participants must have an early stage prostate cancer diagnosis (T0-T2) with no known involved lymph nodes or metastases, and no prior history of cancer (with the exception of nonmelanoma skin cancer) or other major illness that would preclude long term participation. Individuals willing to participate will be administered a lifestyle questionnaire and a dietary assessment. The lifestyle survey ascertains baseline demographics, mode of cancer diagnosis, medical history, smoking, family history of prostate cancer, alcohol use, level of physical activity, and other potential risk factors for prostate cancer progression. Nutritional parameters will be measured through a self-administered, semi-quantitative food frequency questionnaire. A blood specimen will also be collected for genetic and biochemical research. Participants will be followed annually with additional lifestyle and dietary questionnaires.